A symbol-based criterion has been used to optimize the constellation mapper and demapper in [1]} and the pulse-shaping/matched filters in [2]}, [3]} in an end-to-end manner via sl, but sl requires differential models for all hardware and channel, which limits the usage in real communication systems. Instead, rl-based optimization of the constellation mapper and demapper has been proposed in [4]}, [5]}, which does not require any models for hardware and channel. However, in [4]}, [5]}, the (de)mapper operates at the same symbol level as the optimization criterion, and no memory effects of hardware are considered. It requires a generalization for rl-based DPD optimization with a symbol-based criterion due to the data rate difference between DPD parameters and criterion, and memory effects in the pa. To the best of our knowledge, ota DPD optimization using rl with a symbol-based criterion has not yet been addressed.
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